C) Computers Electronic Pocket Calculators have now replaced 
mathematical tables and mechanical equipment for all minor 
calculations. 
Main-frame computers may be employed for large aerial tri- 
angulation networks, but today personal computers and mini- 
computers, can cope with almost all survey and photogram- 
metric calculations. 
A versatile personal computer system might include: 
l. 16k - 32k bytes RAM 
2. Extended BASIC Interpreter 
3. . CRT Display 
4. Magnetic Disc Storage 
In the near future such machines will be commonplace in 
the home, and prices will fall considerably.